Integrated disk driving module including a lateral surface plate bent from an upper plate

ABSTRACT

An integrated disk driving module is disclosed, the module including a base unit including a spindle motor fixture including an opening-formed upper plate, a lateral surface plate bent from the upper plate to form an accommodation space, and a spindle motor fixture concavely formed from the upper plate toward the accommodation space, wherein the spindle motor fixture is integrally formed with the upper plate; and a spindle motor fixed inside the spindle motor fixture to rotate a disk.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.13/038,651, filed Mar. 2, 2011, which claims the benefit under 35 U.S.C.§119 of Korean Patent Application Nos. 10-2010-0019615, filed Mar. 4,2010 and 10-2010-0019616, filed Mar. 4, 2010, which are herebyincorporated by reference in their entirety.

BACKGROUND OF THE DISCLOSURE

1. Field of the Invention

The present disclosure relates to an integrated disk driving module.

2. Description of Related Art

In general, an ODD (Optical Disk Driver) stores huge data on a disk, andreads the data stored in the disk.

The ODD largely includes a base body, a spindle motor coupled to thebase body via a coupling screw, a stepping motor coupled to the basebody via a coupling screw, and an optical pickup module storing data ona disk or reading the data from the disk.

The spindle motor is coupled to the base body via a mounting plate, androtates an optical disk for storing data or an optical disk stored withdata at a high speed.

The stepping motor is coupled to the base body via a mounting plate, andfeeds the optical pickup module to a radial direction of the opticaldisk.

The optical pickup module is coupled to a guide shaft coupled to thebase body via a coupling screw and slides along the guide shaft byrotation of a lead screw of the stepping motor. The optical pickupmodule slides along the guide shaft to store data on the optical diskand reads the data stored in the optical disk.

A stepping motor of an optical disk apparatus according to prior art iscoupled to a base body via a mounting plate and a coupling screw, and anoptical pickup module is coupled to a guide shaft coupled to a base bodyvia a coupling screw o the disadvantage of increasing the number ofparts comprising the optical disk apparatus.

The conventional optical disk apparatus is also disadvantageous in thatthe number of parts increases to take many hours for assembly.

The conventional optical disk apparatus is further disadvantageous inthat product accuracy decreases due to manufacturing tolerances of thebase body and the stepping motor.

The conventional optical disk apparatus is still further disadvantageousin that the stepping motor is coupled to the base body via a couplingscrew to result in frequent assembly badness in which the stepping motoris not mounted at a designated position.

The conventional optical disk apparatus is still further disadvantageousin that a mounting plate for coupling the stepping motor to the basebody is needed to increase size and weight of the optical disk apparatusand to be prone to external shock.

BRIEF SUMMARY

The present disclosure is to provide an integrated disk driving moduleconfigured to reduce the number of parts by integrally forming astepping motor to a base unit, to reduce assembly time as a result ofreduced number of parts, to improve product performance as a result ofreduced assembly tolerances, to inhibit incomplete assembly by arranginga spindle motor at a designated position and to reduce size and weight.

The present disclosure is to provide an integrated disk driving moduleconfigured to reduce the number of parts by integrally forming a guideshaft of an optical pickup module to a base unit, to reduce assemblytime as a result of reduced number of parts and to improve productperformance as a result of reduced assembly tolerances.

An object of the present disclosure is to solve at least one or more ofthe above problems and/or disadvantages in a whole or in part and toprovide at least the advantages described hereinafter. In order toachieve at least the above objects, in whole or in part, and inaccordance with the purposes of the invention, as embodied and broadlydescribed, and in one general aspect of the present disclosure, there isprovided an integrated disk driving module, the module comprising: abase unit including a spindle motor fixture including an opening-formedupper plate, a lateral surface plate bent from the upper plate to forman accommodation space, and a spindle motor fixture concavely formedfrom the upper plate toward the accommodation space, wherein the spindlemotor fixture is integrally formed with the upper plate; and a spindlemotor fixed inside the spindle motor fixture to rotate a disk.

Preferably, the spindle motor fixture integrally formed with the upperplate includes a lateral wall unit bent from the upper plate in a samedirection as that of the lateral surface plate, and a floor unitconnected to the lateral wall unit.

Preferably, the integrated disk driving module further includes acircuit substrate interposed between the spindle motor and the floorunit to be electrically connected to the spindle motor, wherein thelateral wall unit is formed with at least one opening through which partof the circuit substrate passes.

Preferably, the floor unit is formed with at least one floorunit-penetrating circuit substrate alignment hole for aligning thecircuit substrate on a designated position on the floor unit.

Preferably, the integrated disk driving module further includes acircuit substrate interposed between the spindle motor and the floorunit to be electrically connected to the spindle motor, wherein thefloor unit is formed with at least one opening through which part of thecircuit substrate passes.

Preferably, a center of the floor unit of the upper plate is formed witha through hole, and a bearing housing of the spindle motor is coupled tothe through hole of the floor unit by caulking

Preferably, an inner lateral surface of the floor unit formed by thethrough hole formed at the center of the floor unit is formed with aninternal rotation prevention groove concavely formed from the innerlateral surface to inhibit the bearing housing of the spindle motor fromrotating relative to the floor unit.

Preferably, the center of the floor unit is formed with a burring unitprotruded from a bottom surface of the floor unit toward an uppersurface facing the bottom surface, wherein the spindle motor includes acup-shaped bearing housing coupled to the burring unit, a bearingcoupled to an inner side of the bearing housing, a rotation shaftrotatably coupled to the bearing, a stator coupled to the bearinghousing and a rotor coupled to the rotation shaft to interact with thestator.

Preferably, the integrated disk driving module further includes a leadscrew fixed to the upper plate by a coupling screw.

Preferably, the integrated disk driving module further includes anoptical pickup module that is fed by the stepping motor.

Preferably, the integrated disk driving module further includes firstand second guide shafts coupled to the upper plate of the base unit toguide the optical pickup module.

Preferably, the base unit includes a pair of guide shaft fixtures bentfrom the upper plate to a direction of the accommodation space forrespectively fix a first distal end of the first guide shaft, and asecond distal end facing the first distal end, and a pair of secondguide shafts bent from the upper plate to a direction of theaccommodation space for respectively securing a third distal end of thesecond guide shaft and a fourth distal end facing the third distal end.

Preferably, one of first guide shaft fixtures fixed to the first distalend is formed with a through hole through which the first distal endpasses, and the remaining one first guide shaft fixture fixed to thesecond distal end is formed with an insert groove through which thesecond distal end is inserted.

Preferably, one of second guide shaft fixtures fixed to the third distalend is formed with a through hole through which the third distal endpasses, and the remaining one second guide shaft fixture fixed to thefourth distal end is formed with an insert groove through which thefourth distal end is inserted.

Preferably, the integrated disk driving module further includes a firstpressure member fixed at the upper plate for applying pressure to thefirst distal end, a second pressure member fixed at the upper plate forapplying pressure to the second distal end, a third pressure memberfixed at the upper plate for applying pressure to the third distal end,and a fourth pressure member fixed at the upper plate for applyingpressure to the fourth distal end.

Preferably, each of the first through fourth pressure members includes aleaf spring.

Preferably, the integrated disk driving module further includes a heightadjustment screw coupled to the upper plate of the base unit to adjustheights of the first and second distal ends of the first guide shaft,and coupled to the upper plate of the base unit to adjust heights of thethird and fourth distal ends of the second guide shaft.

In another general aspect of the present disclosure, there is providedan integrated disk driving module, the module comprising: a base unitincluding a spindle motor fixture including an opening-formed upperplate, a lateral surface plate bent from the upper plate to form anaccommodation space, and a spindle motor fixture concavely formed fromthe upper plate toward the accommodation space, wherein the guide shaftfixture includes a base unit integrally formed with the upper plate, anoptical pickup module coupled to the guide shaft fixture, and first andsecond guide shafts secured to the guide shaft fixture for guiding theoptical pickup module.

Preferably, the integrated disk driving module further includes astepping motor mounted on the upper plate and formed with a lead screwcoupled to the optical pickup module.

Preferably, the integrated disk driving module further includes aspindle motor mounted on the upper plate for rotating a disk.

Preferably, the guide shaft fixture includes first guide shaft fixturesbent from the upper plate to a direction of the accommodation space forrespectively securing a first distal end of the first guide shaft and asecond distal end facing the first distal end, and a pair of secondguide shafts bent from the upper plate to a direction of theaccommodation space for respectively securing a third distal end of thesecond guide shaft and a fourth distal end facing the third distal end.

Preferably, any one of the first guide shaft fixtures is formed with athrough hole, and a remaining one of the first guide shaft fixtures isformed with an insertion groove.

Preferably, any one of the second guide shafts is formed with a throughhole, and a remaining one of the second guide shaft fixtures is formedwith an insertion groove.

Preferably, the integrated disk driving module further includes a firstpressure member fixed at the upper plate for being contacted with thefirst distal end, a second pressure member fixed at the upper plate forbeing contacted with the second distal end, a third pressure memberfixed at the upper plate for being contacted with the third distal end,and a fourth pressure member fixed at the upper plate for beingcontacted with the fourth distal end.

Preferably, each of the first through fourth pressure members includes aleaf spring.

Preferably, the integrated disk driving module further includes a heightadjustment screw coupled to the upper plate of the base unit to adjustheights of the first and second distal ends of the first guide shaft,and coupled to the upper plate of the base unit to adjust heights of thethird and fourth distal ends of the second guide shaft.

Technical problems to be solved by the present disclosure are notrestricted to the above-mentioned, and any other technical problems notmentioned so far will be clearly appreciated from the followingdescription by those skilled in the art.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a rear perspective view of an integrated disk driving moduleaccording to a first exemplary embodiment of the present invention.

FIG. 2 is a front perspective view of a base unit of FIG. 1.

FIG. 3 is a rear perspective view of a base unit of FIG. 1.

FIG. 4 a is an exploded perspective view of a base unit and a spindlemotor of FIG. 2.

FIG. 4 b is a perspective view illustrating a spindle motor of anintegrated driving module and a floor unit of a spindle motor fixture ofa base unit according to another exemplary embodiment of the presentdisclosure.

FIG. 5 is an exploded perspective view illustrating a spindle motorcoupled to the base unit of FIGS. 3.

FIG. 6 is a partially enlarged view of ‘A’ of FIG. 1.

FIG. 7 is a rear perspective view of an integrated driving moduleaccording to a second exemplary embodiment of the present disclosure.

FIG. 8 is a front perspective view of a base unit of FIG. 1.

FIG. 9 is a rear perspective view of a base unit of FIG. 1.

FIG. 10 is a perspective view illustrating first and second guide shaftsmounted on the base unit of FIG. 8 for guiding an optical pickup module.

DETAILED DESCRIPTION

The following description is not intended to limit the invention to theform disclosed herein. Consequently, variations and modificationscommensurate with the following teachings, and skill and knowledge ofthe relevant art are within the scope of the present invention. Theembodiments described herein are further intended to explain modes knownof practicing the invention and to enable others skilled in the art toutilize the invention in such, or other embodiments and with variousmodifications required by the particular application(s) or use(s) of thepresent invention.

The disclosed embodiments and advantages thereof are best understood byreferring to FIGS. 1-10 of the drawings, like numerals being used forlike and corresponding parts of the various drawings. Other features andadvantages of the disclosed embodiments will be or will become apparentto one of ordinary skill in the art upon examination of the followingfigures and detailed description. It is intended that all suchadditional features and advantages be included within the scope of thedisclosed embodiments, and protected by the accompanying drawings.Further, the illustrated figures are only exemplary and not intended toassert or imply any limitation with regard to the environment,architecture, or process in which different embodiments may beimplemented. Accordingly, the described aspect is intended to embraceall such alterations, modifications, and variations that fall within thescope and novel idea of the present invention.

It will be understood that the terms “comprises” and/or “comprising,” or“includes” and/or “including” when used in this specification, specifythe presence of stated features, regions, integers, steps, operations,elements, and/or components, but do not preclude the presence oraddition of one or more other features, regions, integers, steps,operations, elements, components, and/or groups thereof. That is, theterms “including”, “includes”, “having”, “has”, “with”, or variantsthereof are used in the detailed description and/or the claims to denotenon-exhaustive inclusion in a manner similar to the term “comprising”.

Furthermore, “exemplary” is merely meant to mean an example, rather thanthe best. It is also to be appreciated that features, layers and/orelements depicted herein are illustrated with particular dimensionsand/or orientations relative to one another for purposes of simplicityand ease of understanding, and that the actual dimensions and/ororientations may differ substantially from that illustrated. That is, inthe drawings, the size and relative sizes of layers, regions and/orother elements may be exaggerated or reduced for clarity. Like numbersrefer to like elements throughout and explanations that duplicate oneanother will be omitted. Now, the present invention will be described indetail with reference to the accompanying drawings.

First Exemplary Embodiment

FIG. 1 is a rear perspective view of an integrated disk driving moduleaccording to a first exemplary embodiment of the present invention, FIG.2 is a front perspective view of a base unit of FIG. 1, and FIG. 3 is arear perspective view of a base unit of FIG. 1.

Referring to FIG. 1, an integrated disk driving module (700) may includea base unit (100), a spindle motor (200) and a stepping motor (300). Theintegrated disk driving module (700) may further include an opticalpickup module (400).

Referring to FIGS. 2 and 3, the base unit (100) includes an upper plate(110), a lateral surface plate (120) and a stepping motor fixture (140).The base unit (100) may further include first and second guide shaftfixtures (150, 160).

The upper plate (110) includes a metal plate, and is centrally formedwith an opening (110 a).

The opening (110 a)-formed upper plate (110) may take the shape of anoctagonal plate when viewed from a plane. Although the present exemplaryembodiment of the present disclosure describes the upper plate (110) ofan octagonal plate, the shape of the upper plate (110) may take variousshapes based on arrangement and shape of the spindle motor (200,described later) the stepping motor (300) and the optical pickup module(400).

A lateral surface plate (120) is bent from an edge of the upper plate(110) to one direction of the upper plate (110), and an accommodationspace is formed at the base unit (100) by the upper plate (110) and thelateral surface plate (120). In the present exemplary embodiment, thelateral surface plate (120) is formed perpendicularly to the upper plate(110), for example.

The spindle motor fixture (130) is formed in the shape of a recess fromthe upper plate (110) toward the accommodation space, and in the presentexemplary embodiment, the spindle motor fixture (130) is integrallyformed with the upper plate (110).

The recess-shaped spindle motor fixture (130) includes a lateral wallunit (133) and a floor unit (136), where the lateral wall unit (133) andthe floor unit (136) are integrally formed with the upper plate (110).

The lateral wall unit (133) is bent from the upper plate (110) to a samedirection as the bent direction of the lateral wall unit (120), and maybe aligned in parallel with the lateral surface plate (120). That is,the lateral wall unit (133) is aligned perpendicularly formed relativeto the upper plate (110), for example.

The lateral wall unit (133) bent from the upper plate (110) is formedwith at least one opening (134), where three openings (134) may beformed at the lateral wall unit (133). Each of the three openings (134)may be formed in a same size or in a different size.

A circuit substrate (180, described later) electrically connected to thespindle motor (200, described later) is passed by the opening (134)formed at the lateral wall unit (133). Furthermore, the integrateddriving module (700) can have a lighter weight by the openings (134)formed at the lateral wall unit (133).

The floor unit (136) is integrally formed with the lateral wall unit(133), and may be aligned in parallel with the upper plate (110), forexample. In the present exemplary embodiment, the floor unit (136) takesthe same shape as that of the spindle motor (200, described later). Forexample, the floor unit (136) may take the shape of a disk when viewedon a plane. Although the present exemplary embodiment describes andillustrates the disk-shaped floor unit (136), the floor unit (136) mayalternatively take various other shapes, in addition to the disk shape.

A center of the floor unit (136) is formed with a circle-shaped throughhole (137), into which a bearing housing (139) for securing the spindlemotor (200, described later) to the floor unit (136) and securing abearing of the spindle motor (200) and a rotation shaft is coupled.

Referring to FIG. 3, an inner lateral surface of the floor unit (136)formed by the through hole (137) formed at the center of the floor unit(136) is formed with an internal rotation prevention groove (136 a)concavely formed from the inner lateral surface to inhibit the bearinghousing of the spindle motor (200) from rotating relative to the floorunit (136).

At least one alignment hole (138) is formed about the through hole (137)formed at the center of the floor unit (136). The alignment hole (138)functions to align a circuit substrate (described later) interposedbetween the floor unit (136) and the spindle motor (200) arranged on thefloor unit (136) on a designated position of the floor unit (136). Thealignment hole (138) penetrates an upper surface on which the spindlemotor (200) is disposed and a bottom surface facing the upper surface onthe floor unit (136).

The floor unit (136) is formed with a slit-shaped opening (136 c) forextracting part of the circuit substrate (180) interposed between thespindle motor (200) and the spindle motor fixture (130) to outside ofthe spindle motor fixture (130) through the floor unit (136). Theslit-shaped opening (136 c) may take the shape of a linear shape or acurved shape when viewed from a plane. Referring to FIG. 3 again, theupper plate (110) is formed with a first guide shaft fixture (150) and asecond shaft fixture (160) to secure first and second guide shafts(described later). Each of the first and second shaft fixtures (150,160) is formed at each side of the upper plate (110) of the base unit(100).

The first guide shaft fixture (150) is integrally formed with the upperplate (110) of the base unit (100), and functions to secure a firstguide shaft (410, see FIG. 4 a) of the optical pickup module (400,described later) to the base unit (100).

The first guide shaft fixture (150) is formed in a pair on the upperplate (110), each facing the other fixture, and each of the pair offirst guide shaft fixtures (150) is bent from the upper plate (110)toward the accommodation space.

The one first guide shaft fixture (150) is formed with an insertiongroove in which a first distal end of the first guide shaft (describedlater) is inserted, and the remaining another first guide shaft fixture(150) is formed with a through hole through which a second distal endfacing the first distal end of the first guide shaft (410) passes. Inthe present exemplary embodiment, the through hole through which thesecond distal end of the first guide shaft (410) passes may take theshape of an oblong (or a slit).

Furthermore, a coupling hole is formed at each position facing the firstguide shaft protruded outside of each of the first guide shaft fixtures(150) on the upper plate (110), and each coupling hole is formed with aheight adjustment screw (149 a). The height adjustment screw (149 a)adjusts a height of the first guide shaft (410) relative to the upperplate (110).

The second guide shaft fixture (160) arranged in parallel with the firstguide shaft fixture (150) is formed at the upper plate (110) of the baseunit (100), and functions to secure a second guide shaft (420, describedlater and see FIG. 5) to the upper plate (110) of the base unit (100).

The second guide shaft fixture (160) is arranged on the upper plate(110) in a pair, each facing the other, and each of the pair of secondguide shaft fixtures (160) is bent from the upper plate (110) toward theaccommodation space.

One of the pair of second guide shaft fixtures (160) is formed with aninsertion groove through which a third distal end of the second guideshaft (420, described later) is inserted. The remaining one of the pairof second guide shaft fixtures (160) is formed with a through holethrough which a fourth distal end facing the third distal end of thesecond guide shaft (420, described later) passes.

In the present exemplary embodiment, the through hole for passing thefourth distal end of the second guide shaft (420) may take the shape ofan oblong or a slit.

Coupling holes are formed at positions facing the second guide shaft(420) protruded outside of the second guide shaft fixtures (160) on theupper plate (110), where each of the coupling holes is formed with aheight adjustment screw (149 b). The height adjustment screw (149 b)adjusts a height between second guide shaft (420) and the upper surface(110).

FIG. 4 a is an exploded perspective view of a base unit and a spindlemotor of FIG. 2.

Referring to FIGS. 1 and 4 a, the spindle motor (200) is arranged insidea spindle motor fixture (130) concavely formed from the upper plate(110) of the base unit (100).

The spindle motor (200) includes a bearing housing (139), a stator (notshown) secured at the hearing housing (139) and a rotor (210) rotatingin association with the stator coupled to a rotation shaft (not shown)coupled to the bearing housing (139). The spindle motor (200) mayfurther include a disk fixture device (220) coupled to the rotationshaft for securing a disk.

The bearing housing (139) is coupled to a through hole (137) formed atthe floor unit (136) of the spindle motor fixture (130) bent from theupper plate (110) of the base unit (100). In the present exemplaryembodiment, the floor unit (136) of the spindle motor fixture (130)functions as a mounting plate coupled to the spindle motor of prior artvia a coupling screw. In the present exemplary embodiment, configurationof the spindle motor (200) is not limited thereto, but may include othervarious constituent elements or may delete some of the above-mentionedconfigurations.

The disk fixture device (220) is rotated along with a rotation shaft bybeing coupled to the rotation shaft of the spindle motor (200), and iscoupled with an optical disk for storing data or an optical disk forreading the stored data.

The spindle motor (200) is arranged with a thin circuit substrate (180)that is applied with a driving signal. In the present exemplaryembodiment, the circuit substrate (180) may be a flexible circuitsubstrate.

Part of the circuit substrate (180) is interposed between the spindlemotor (200) and the floor unit (136) of the spindle motor fixture (130),and is extracted outside of the spindle motor fixture (130) through anopening (134) formed at the lateral surface unit (133) of the spindlemotor fixture (130).

FIG. 4 b is a perspective view illustrating a spindle motor of anintegrated driving module and a floor unit of a spindle motor fixture ofa base unit according to another exemplary embodiment of the presentdisclosure.

Referring to FIG. 4 b, the floor unit of a spindle motor fixture of abase unit according to another exemplary embodiment of the presentdisclosure is formed with a cylindrical burring unit (136 b) protrudedtoward an upper surface facing a bottom surface from the bottom surfaceof the floor unit (136).

The burring unit (136 b) is formed therein with an upper surface-openedcup-shaped bearing housing (230), and the bearing housing (230) iscoupled therein by a cylindrical bearing (240). The bearing (240)coupled to the bearing housing (230) is rotatably coupled by a rotationshaft (260) relative to the bearing (240). Reference numeral 250 is athrust bearing that supports the rotation shaft.

The burring unit (136) is formed at a periphery thereof with a stator(270). The stator (270) includes a core (273) formed by stacking aplurality of iron pieces, and a coil (276) wound on the core (273).

The rotation shaft (260) is formed at a periphery thereof with a rotor(280). The rotor (280) includes a yoke (283) and a magnet (286), wherethe yoke (283) is coupled to the rotation shaft (260), and a part of theyoke (283) facing the core (273) of the stator (270) is formed with themagnet (286). The rotor (280) and the rotation shaft (260) are rotatedby a magnetic field generated by the coil (276) wound on the core (273)which is a part of the stator (270) and action of the magnet (286) whichis a part of the rotor (280).

FIG. 5 is an exploded perspective view illustrating a spindle motorcoupled to the base unit of FIG. 3.

Referring to FIGS. 3 and 5, the upper plate (110) of the base unit (100)is coupled with the stepping motor (300), where the stepping motor (300)includes a stepping motor body (310), a lead screw (320), a pivot member(325) and a cover case (330).

The stepping motor body (310) includes a stator (not s town), and thelead screw (320) is rotated in association with the stator. In thepresent exemplary embodiment, the stepping motor body (310) and the leadscrew (320) may include various configurations, such that theconfiguration of the stepping motor body is not limited thereto.

The lead screw (320) is toward a radial direction of an optical disksecured at the disk fixture device (220) of the spindle motor (200). Thelead screw (320) is coupled at a distal end thereof with the cover case(330), where the cover case (330) is secured at the upper plate (110) ofthe base unit (100) via a coupling screw.

Referring to FIGS. 1 and 5 again, the integrated disk driving module(700) according to an exemplary embodiment of the present disclosure mayinclude an optical pickup module (400).

The optical pickup module (400) reciprocates along a radial direction ofthe disk by the lead screw (320) of the stepping motor (300) secured tothe upper plate (110) of the base unit (100) by a coupling screw, andfirst and second guide shafts (410, 420) arranged in parallel with thelead screw (320).

The first guide shaft (410) is slidably coupled to one side of theoptical pickup module (400), and includes a first distal end (411) and asecond distal end (412) opposite to the first distal end (411).

The first and second distal ends (411, 412) of the first guide shaft(410) are respectively coupled to the pair of first guide shaft fixtures(150).

The second guide shaft (420) is slidably coupled to the other sideopposite to the one side of the optical pickup module (400), andincludes a third distal end (421) and a fourth distal end (421) oppositeto the third distal end (421). The third and fourth distal ends (421,422) of the second guide shaft (420) are respectively coupled to thepair of second guide shaft fixtures (160).

FIG 6 is a partially enlarged view of ‘A’ of FIG. 1.

Referring to FIGS. I and 6, the first distal end (411) of the firstguide shaft (410) is arranged with a first press member (340) includes afirst pressure member (340) to inhibit the first and second distal ends(411, 412) of the first guide shaft (410), and a second pressure member(347) is arranged at the second distal end (412).

The third distal end (421) of the second guide shaft (420) is arrangedwith a third pressure member (348) to inhibit the third and fourthdistal ends (421, 422) of the first guide shaft (420), and a fourthpressure member (349) is arranged at the fourth distal end (422).

Each of the first to fourth pressure members (340, 347, 348, 349) takesthe shape of a leaf spring, each distal end of one each side of thefirst to fourth pressure members (340, 347, 348, 349) is secured at theupper plate (110), and each distal end facing the other each side of thefirst to fourth pressure members (340, 347, 348, 349) applies pressureto the first to fourth distal ends (411, 412, 421, 422).

The integrated disk driving module according to the first exemplaryembodiment of the present disclosure has an advantageous effect in thata base unit is formed with a recess-shaped spindle motor fixture formounting a spindle motor, and the spindle motor fixture is mounted witha spindle motor to reduce the number of parts of the integrated diskdriving module, to reduce assembly time as a result of reduced number ofparts, to improve product performance as a result of reduced assemblytolerances, to inhibit incomplete assembly and to reduce size andweight.

Second Exemplary Embodiment

FIG. 7 is a rear perspective view of an integrated driving moduleaccording to a second exemplary embodiment of the present disclosure,FIG. 8 is a front perspective view of a base unit of FIG. 1, FIG. 9 is arear perspective -view of a base unit of FIG. 1, and FIG. 10 is aperspective view illustrating first and second guide shafts mounted onthe base unit of FIG. 8 for guiding an optical pickup module.

Referring to FIG. 1 again, an integrated disk driving module (1700)includes a base unit (1100), and an optical pickup module (1400). Theintegrated disk driving module (1700) may further include a steppingmotor (1200) and a stepping motor (1300).

Referring to FIGS. 8 and 9, the base unit (1100) includes an upper plate(1100), a lateral surface plate (1120) and guide shaft fixtures (1150,1160).

The upper plate (1100) includes a metal plate and is centrally formedwith an opening (1110 a), part of the opening (1110 a) takes the shapeof a semi-circle, when viewed from a plane, in order to accommodate thespindle motor (1200, described later).

The opening (1110 a)-formed upper plate (1100) may take the shape of anoctagonal plate when viewed from a plane. Although the present exemplaryembodiment of the present disclosure describes the upper plate (1100) ofan octagonal plate, the shape of the upper plate (1100) may take variousshapes based on arrangement and shape of the spindle motor (1200,described later), the stepping motor (1300) and the optical pickupmodule (1400).

A lateral surface plate (1120) is bent from an edge of the upper plate(1100) to one direction of the upper plate (1110), and an accommodationspace is formed at the base unit (1100) by the upper plate (1110) andthe lateral surface plate (1120). in the present exemplary embodiment,the lateral plate (1120) is formed perpendicularly to the upper plate(1110), for example.

The guide shaft fixtures (1150, 1160) function to secure first andsecond guide shafts (1410, 1420) to the base unit (1100) for feeding theoptical pickup module (1400, described later). In the present exemplaryembodiment, the guide shaft fixtures (1150, 1160) are integrally formedwith the upper plate (1100).

Referring to FIG. 9, the guide shaft fixtures (1150, 1160) arerespectively defined as first and second guide shaft fixtures (1150,1160) for securing the first and second guide shafts (1410, 1420,described later).

The guide shaft fixtures (1150, 1160) are respectively formed at eitherside of the spindle motor (1200, described later) fixed to the upperplate (1110) of the base unit (1100). The first guide shaft fixture(1150) is integrally formed with the upper plate (1110) of the base unit(1100), and coupled to the first guide shaft (1410, see FIG. 10).

The first guide shaft fixture (1150) is formed in a pair on the upperplate (1110), each facing the other fixture, and each of the pair offirst guide shaft fixtures (1150) is bent from the upper plate (1110)toward the accommodation space.

The one first guide shaft fixture (1150) is formed with an insertiongroove into which a first distal end of the first guide shaft (1410,described later) is inserted, and the remaining another first guideshaft fixture (1150) is formed with a through hole through which asecond distal end facing the first distal end of the first guide shaft(1410) passes. In the present exemplary embodiment, the through holethrough which the second distal end of the first guide shaft (1410)passes may take the shape of an oblong (or a slit).

Furthermore, a coupling hole is formed at each position facing first andsecond distal ends (1411, 1412) of the first guide shaft (1410)protruded outside of each first guide shaft fixtures (1150) on the upperplate (1110), and the each coupling hole is formed with a heightadjustment screw (1149 a). The height adjustment screw (1149 a) adjustsa height of the first guide shaft (1410) relative to the upper plate(1110).

The second guide shaft fixture (1160) arranged in parallel with thefirst guide shaft fixture (1150) is formed at the upper plate (1110) ofthe base unit (1100), and functions to secure a second guide shaft(1420, described later and see FIG. 10) to the upper plate (1110) of thebase unit (1100).

The second guide shaft fixture (1160) is arranged on the upper plate(1110) in a pair, each facing the other, and each of the pair of secondguide shaft fixtures (1160) is bent from the upper plate (1110) towardthe accommodation space.

One of the pair of second guide shaft fixtures (1160) is formed with aninsertion groove through which a third distal end of the second guideshaft (1420, described later) is inserted. The remaining one of the pairof second guide shaft fixtures (1160) is formed with a through holethrough which a fourth distal end facing the third distal end of thesecond guide shaft (1420, described later) passes.

In the present exemplary embodiment, the through hole for passing thefourth distal end of the second guide shaft (1420) may take the shape ofan oblong or a slit.

A coupling hole is formed at a position facing each of third and fourthdistal ends (1421, 1422) of the second guide shaft (1420) protrudedoutside of each of the second guide shaft fixtures (1160) on the upperplate (110), where each of the coupling holes is formed with a heightadjustment screw (1149 b). The height adjustment screw (1149 b) adjustsa height between second guide shaft (1420) and the upper surface (1110).

Referring to FIGS. 7 and 8, a spindle motor body (1210) of the spindlemotor (1200) is mounted at the upper plate (1110) of the base unit(1100) with a part of semi-circle opening.

The spindle motor (1200) is coupled to a mounting plate (1220), which isin turn coupled to the upper plate (1110) of the base unit (1100) via aplurality of coupling screw. In the second exemplary embodiment, thespindle motor may take various shapes, such that configuration of thespindle motor (1200) is not limited thereto. The stepping motor (1300)is coupled to the upper plate (1110) of the base unit (1100).

The stepping motor (1300) includes a stepping motor body (1310), a leadscrew (1320), a pivot member (1325) and a cover case (1330).

The stepping motor body (1310) includes a stator (not shown), and thelead screw (1320) is rotated in association with the stator. in thepresent exemplary embodiment, the stepping motor body (1310) and thelead screw (1320) may include various configurations, such that theconfiguration of the stepping motor body (1310) is not limited thereto.

The lead screw (1320) is formed toward a radial direction of an opticaldisk secured at the disk fixture device (1220) of the spindle motor(1200). The lead screw (1320) is coupled at a distal end thereof withthe cover case (1330), where the cover case (1330) is secured at theupper plate (1110) of the base unit (1100) via a coupling screw.

FIG. 10 is a perspective view illustrating first and second guide shaftsmounted on the base unit of FIG. 8 for guiding an optical pickup module.

Referring to FIGS. 7 and 10, the optical pickup module (1400)reciprocates along a radial direction of the disk by the lead screw(1320) of the stepping motor (1300) secured to the upper plate (1110) ofthe base unit (1100) by a coupling screw, and first and second guideshafts (1410, 1420) arranged in parallel with the lead screw (1320).

The first guide shaft (1410) is slidably coupled to one side of theoptical pickup module (1400). The first guide shaft (1410) is funnedwith a first distal end (1411) and a second distal end (1412) oppositeto the first distal end (1411). The first and second distal ends (1411,1412) of the first guide shaft (1410) are respectively coupled to thepair of first guide shaft fixtures (1150). The second guide shaft (1420)is slidably coupled to the other side of the optical pickup module(1400) facing the one side of the optical pickup module (1400).

The second guide shaft (1420) includes a third distal end (1421) and afourth distal end (1422) opposite to the third distal end (1421). Thethird and fourth distal ends (1421, 1422) of the second guide shaft(1420) are respectively coupled to the pair of second guide shaftfixtures (1160).

Referring to FIG. 7 again, the first distal end (1411) of the firstguide shaft (1410) is arranged with a first press member (1340) toinhibit the first and second distal ends (1411, 1412) of the first guideshaft (1410), and a second pressure member (1347) is arranged at thesecond distal end (1412).

The third distal end (1421) of the second guide shaft (1420) is arrangedwith a third pressure member (1348) to inhibit the third and fourthdistal ends (1421, 1422) of the first guide shaft (1420), and a fourthpressure member (1349) is arranged at the fourth distal end (1422).

Each of the first to fourth pressure members (1340, 1347, 1348, 1349)takes the shape of a leaf spring, each distal end of one each side ofthe first to fourth pressure members (1340, 1347, 1348, 1349) is securedat the upper plate (1110), and each distal end facing the other eachside of the first to fourth pressure members (1340, 1347, 1348, 1349)applies pressure to the first to fourth distal ends (1411, 1412, 1421,1422).

The integrated disk driving module according to the second exemplaryembodiment of the present disclosure has an advantageous effect in thata base unit is formed with a spindle motor fixture for mounting a leadscrew of spindle motor, and the spindle motor fixture is mounted withthe lead screw coupled to the spindle motor to reduce the number ofparts of the integrated disk driving module, to reduce assembly time asa result of reduced number of parts, to improve product performance as aresult of reduced assembly tolerances, to inhibit incomplete assemblyand to reduce size and weight by arranging the spindle motor and thestepping motor at designated positions.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis invention. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. An integrated disk driving module, the modulecomprising: a base unit including a spindle motor fixture including anopening-formed upper plate, a lateral surface plate bent from the upperplate to form an accommodation space, and a spindle motor fixtureconcavely formed from the upper plate toward the accommodation space,wherein the spindle motor fixture is integrally formed with the upperplate; and a spindle motor fixed inside the spindle motor fixture torotate a disk.
 2. The integrated disk driving module of claim 1, whereinthe spindle motor fixture integrally formed with the upper plateincludes a lateral wall unit bent from the upper plate in a samedirection as that of the lateral surface plate, and a floor unitconnected to the lateral wall unit.
 3. The integrated disk drivingmodule of claim 2, further comprising a circuit substrate interposedbetween the spindle motor and the floor unit to be electricallyconnected to the spindle motor, wherein the lateral wall unit is formedwith at least one opening through which part of the circuit substratepasses.
 4. The integrated disk driving module of claim 3, wherein thefloor unit is formed with at least one floor unit-penetrating circuitsubstrate alignment hole for aligning the circuit substrate on adesignated position on the floor unit.
 5. The integrated disk drivingmodule of claim 2, further comprising a circuit substrate interposedbetween the spindle motor and the floor unit to be electricallyconnected to the spindle motor, wherein the floor unit is formed with atleast one opening through which part of the circuit substrate passes. 6.The integrated disk driving module of claim 2, wherein a center of thefloor unit of the upper plate is formed with a through hole, and abearing housing of the spindle motor is coupled to the through hole ofthe floor unit by caulking.
 7. The integrated disk driving module ofclaim 2, wherein an inner lateral surface of the floor unit formed bythe through hole formed at the center of the floor unit is formed withan internal rotation prevention groove concavely formed from the innerlateral surface to prevent the bearing housing of the spindle motorfrom. rotating relative to the floor unit.
 8. The integrated diskdriving module of claim 2, wherein the center of the floor unit isformed with a burring unit protruded from a bottom surface of the floorunit toward an upper surface facing the bottom surface, wherein thespindle motor includes a cup-shaped bearing housing coupled to theburring unit, a bearing coupled to an inner side of the bearing housing,a rotation shaft rotatably coupled to the bearing, a stator coupled tothe bearing housing and a rotor coupled to the rotation shaft tointeract with the stator.
 9. The integrated disk driving module of claim1, further comprising a lead screw fixed to the upper plate by acoupling screw.
 10. The integrated disk driving module of claim 9,further comprising an optical pickup module that is fed by the steppingmotor.
 11. The integrated disk driving module of claim 9, furthercomprising first and second. guide shafts coupled to the upper plate ofthe base unit to guide the optical pickup module.
 12. The integrateddisk driving module of claim 11, wherein the base unit includes a pairof guide shaft fixtures bent from the upper plate to a direction of theaccommodation space for respectively fix a first distal end of the firstguide shaft and a second distal end facing the first distal end, and apair of second guide shafts bent from the upper plate to a direction ofthe accommodation space for respectively securing a third distal end ofthe second guide shaft and a fourth distal end facing the third distalend.
 13. The integrated disk driving module of claim 12, wherein one offirst guide shaft fixtures fixed to the first distal end is formed witha through hole through which the first distal end passes, and theremaining one first guide shaft fixture fixed to the second distal endis formed with an insert groove through which the second distal end isinserted.
 14. The integrated disk driving module of claim 12, whereinone of second guide shaft fixtures fixed to the third distal end isformed with a through hole through which the third distal end passes,and the remaining one second guide shaft fixture fixed to the fourthdistal end is formed with an insert groove through which the fourthdistal end is inserted.
 15. The integrated disk driving module of claim12, wherein the integrated disk driving module further includes a firstpressure member fixed at the upper plate for applying pressure to thefirst distal end, a second pressure member fixed at the upper plate forapplying pressure to the second distal end, a third pressure memberfixed at the upper plate for applying pressure to the third distal end,and a fourth pressure member fixed at the upper plate for applyingpressure to the fourth distal end.
 16. The integrated disk drivingmodule of claim 12, wherein each of the first through fourth pressuremembers includes a leaf spring.
 17. The integrated disk driving moduleof claim 12, further comprising a height adjustment screw coupled to theupper plate of the base unit to adjust heights of the first and seconddistal ends of the first guide shaft, and coupled to the upper plate ofthe base unit to adjust heights of the third and fourth distal ends ofthe second guide shaft.
 18. An integrated disk driving module, themodule comprising: a base unit including a spindle motor fixtureincluding an opening-formed upper plate, a lateral surface plate bentfrom the upper plate to form an accommodation space, and a spindle motorfixture concavely formed from the upper plate toward the accommodationspace, wherein the guide shaft fixture includes a base unit integrallyformed with the upper plate, an optical pickup module coupled to theguide shaft fixture, and first and second guide shafts secured to theguide shaft fixture for guiding the optical pickup module.
 19. Theintegrated disk driving module of claim 18, further comprising astepping motor mounted on the upper plate and formed with a lead screwcoupled to the optical pickup module.
 20. The integrated disk drivingmodule of claim 18, further comprising a spindle motor mounted on theupper plate for rotating a disk.
 21. The integrated disk driving moduleof claim 18, wherein the guide shaft fixture includes first guide shaftfixtures bent from the upper plate to a direction of the accommodationspace for respectively securing a first distal end of the first guideshaft and a second distal end facing the first distal end, and a pair ofsecond guide shafts bent from the upper plate to a direction of theaccommodation space for respectively securing a third distal end of thesecond guide shaft and a fourth distal end facing the third distal end.22. The integrated disk driving module of claim 21, wherein any one ofthe first guide shaft fixtures is formed with a through hole, and aremaining one of the first guide shaft fixtures is formed with aninsertion groove.
 23. The integrated disk driving module of claim 21,wherein any one of the second guide shafts is formed with a throughhole, and a remaining one of the second guide shaft fixtures is formedwith an insertion groove.
 24. The integrated disk driving module ofclaim 21, further comprising a first pressure member fixed at the upperplate for being contacted with the first distal end, a second pressuremember fixed at the upper plate for being contacted with the seconddistal end, a third pressure member fixed at the upper plate for beingcontacted with the third distal end, and a fourth pressure member fixedat the upper plate for being contacted with the fourth distal end. 25.The integrated disk driving module of claim 21, wherein each of thefirst through fourth pressure members includes a leaf spring.
 26. Theintegrated disk driving module of claim 21, further comprising a heightadjustment screw coupled to the upper plate of the base unit to adjustheights of the first and second distal ends of the first guide shaft,and coupled to the upper plate of the base unit to adjust heights of thethird and fourth distal ends of the second guide shaft.